src/tiff/tif_dumpmode.c

/* $Header$ */

/*
 * Copyright (c) 1988-1997 Sam Leffler
 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

/*
 * TIFF Library.
 *
 * "Null" Compression Algorithm Support.
 */
#include "tiffiop.h"
#include <assert.h>

/*
 * Encode a hunk of pixels.
 */
static int
DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
{
	(void) s;
	while (cc > 0) {
		tsize_t n;

		n = cc;
		if (tif->tif_rawcc + n > tif->tif_rawdatasize)
			n = tif->tif_rawdatasize - tif->tif_rawcc;

                assert( n > 0 );

		/*
		 * Avoid copy if client has setup raw
		 * data buffer to avoid extra copy.
		 */
		if (tif->tif_rawcp != pp)
			_TIFFmemcpy(tif->tif_rawcp, pp, n);
		tif->tif_rawcp += n;
		tif->tif_rawcc += n;
		pp += n;
		cc -= n;
		if (tif->tif_rawcc >= tif->tif_rawdatasize &&
		    !TIFFFlushData1(tif))
			return (-1);
	}
	return (1);
}

/*
 * Decode a hunk of pixels.
 */
static int
DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
{
	(void) s;
	if (tif->tif_rawcc < cc) {
		TIFFError(tif->tif_name,
		    "DumpModeDecode: Not enough data for scanline %d",
		    tif->tif_row);
		return (0);
	}
	/*
	 * Avoid copy if client has setup raw
	 * data buffer to avoid extra copy.
	 */
	if (tif->tif_rawcp != buf)
		_TIFFmemcpy(buf, tif->tif_rawcp, cc);
	tif->tif_rawcp += cc;
	tif->tif_rawcc -= cc;
	return (1);
}

/*
 * Seek forwards nrows in the current strip.
 */
static int
DumpModeSeek(TIFF* tif, uint32 nrows)
{
	tif->tif_rawcp += nrows * tif->tif_scanlinesize;
	tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
	return (1);
}

/*
 * Initialize dump mode.
 */
int
TIFFInitDumpMode(TIFF* tif, int scheme)
{
	(void) scheme;
	tif->tif_decoderow = DumpModeDecode;
	tif->tif_decodestrip = DumpModeDecode;
	tif->tif_decodetile = DumpModeDecode;
	tif->tif_encoderow = DumpModeEncode;
	tif->tif_encodestrip = DumpModeEncode;
	tif->tif_encodetile = DumpModeEncode;
	tif->tif_seek = DumpModeSeek;
	return (1);
}
Commit	Line	Data
	1	/* $Header$ */
	2
	3	/*
	4	* Copyright (c) 1988-1997 Sam Leffler
	5	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	6	*
	7	* Permission to use, copy, modify, distribute, and sell this software and
	8	* its documentation for any purpose is hereby granted without fee, provided
	9	* that (i) the above copyright notices and this permission notice appear in
	10	* all copies of the software and related documentation, and (ii) the names of
	11	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	12	* publicity relating to the software without the specific, prior written
	13	* permission of Sam Leffler and Silicon Graphics.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	17	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	20	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	21	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	22	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	23	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*/
	26
	27	/*
	28	* TIFF Library.
	29	*
	30	* "Null" Compression Algorithm Support.
	31	*/
	32	#include "tiffiop.h"
	33	#include <assert.h>
	34
	35	/*
	36	* Encode a hunk of pixels.
	37	*/
	38	static int
	39	DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
	40	{
	41	(void) s;
	42	while (cc > 0) {
	43	tsize_t n;
	44
	45	n = cc;
	46	if (tif->tif_rawcc + n > tif->tif_rawdatasize)
	47	n = tif->tif_rawdatasize - tif->tif_rawcc;
	48
	49	assert( n > 0 );
	50
	51	/*
	52	* Avoid copy if client has setup raw
	53	* data buffer to avoid extra copy.
	54	*/
	55	if (tif->tif_rawcp != pp)
	56	_TIFFmemcpy(tif->tif_rawcp, pp, n);
	57	tif->tif_rawcp += n;
	58	tif->tif_rawcc += n;
	59	pp += n;
	60	cc -= n;
	61	if (tif->tif_rawcc >= tif->tif_rawdatasize &&
	62	!TIFFFlushData1(tif))
	63	return (-1);
	64	}
	65	return (1);
	66	}
	67
	68	/*
	69	* Decode a hunk of pixels.
	70	*/
	71	static int
	72	DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
	73	{
	74	(void) s;
	75	if (tif->tif_rawcc < cc) {
	76	TIFFError(tif->tif_name,
	77	"DumpModeDecode: Not enough data for scanline %d",
	78	tif->tif_row);
	79	return (0);
	80	}
	81	/*
	82	* Avoid copy if client has setup raw
	83	* data buffer to avoid extra copy.
	84	*/
	85	if (tif->tif_rawcp != buf)
	86	_TIFFmemcpy(buf, tif->tif_rawcp, cc);
	87	tif->tif_rawcp += cc;
	88	tif->tif_rawcc -= cc;
	89	return (1);
	90	}
	91
	92	/*
	93	* Seek forwards nrows in the current strip.
	94	*/
	95	static int
	96	DumpModeSeek(TIFF* tif, uint32 nrows)
	97	{
	98	tif->tif_rawcp += nrows * tif->tif_scanlinesize;
	99	tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
	100	return (1);
	101	}
	102
	103	/*
	104	* Initialize dump mode.
	105	*/
	106	int
	107	TIFFInitDumpMode(TIFF* tif, int scheme)
	108	{
	109	(void) scheme;
	110	tif->tif_decoderow = DumpModeDecode;
	111	tif->tif_decodestrip = DumpModeDecode;
	112	tif->tif_decodetile = DumpModeDecode;
	113	tif->tif_encoderow = DumpModeEncode;
	114	tif->tif_encodestrip = DumpModeEncode;
	115	tif->tif_encodetile = DumpModeEncode;
	116	tif->tif_seek = DumpModeSeek;
	117	return (1);
	118	}